Contemporary Niti Rotary Instrumentation And The Integrity Of Root Dentin: Does Cutting-Edge Shaping Create Future Fractures? — A Narrative Review
- Author:
Tony Francis
;
Vijayendranath S Nayak
;
Roma Mascarenthas
;
Karthik Kannaiyan
;
Saptarshi Bhowal
- Publication Type:Review
- Keywords:
nickel-titanium;
rotary instrumentation;
dentin microcracks;
root fracture;
endodontics
- From:
Pacific Journal of Medical Sciences
2025;27(1):65-69
- CountryPapua New Guinea
- Language:English
-
Abstract:
Nickel-titanium (NiTi) rotary instruments have transformed endodontics by enabling efficient, predictable
root canal shaping. However, concerns persist about their impact on dentin integrity, particularly
microcrack formation and long-term fracture risks. This narrative review evaluates evidence on
contemporary NiTi systems—including thermally treated alloys and reciprocating files—and their effects
on dentin structural integrity. While advanced designs reduce torsional stress, in vitro studies report
conflicting outcomes on microcrack induction. Clinicians must balance shaping efficiency with
preservation of dentin strength. Further in vivo studies are needed to correlate laboratory findings with
clinical outcomes.
